I have successfully extended Grandpa Janek's Photo Album to include additional slides. When I tried to do the same with his Christmas Magic (https://www.youtube.com/watch?v=Ge5Q-IIODSw), which uses a different shaped page from the Photo Album, I failed dismally. He told me that "it is technically very difficult to synchronize the slides" which I assume is because the Christmas Magic pages include a varying number of images. I thought I might be able to adapt the page designs, ie alter the shape, used in the Photo Album and include them in a new version of Christmas Magic. I got far enough to think its possible but became confused with number of layers, rotate centres and horizontal tilts. Wondered whether anyone has managed to extend this show, please?